DE1952726A1 - Spooling device with adjustable contact pressure - Google Patents

Description

My mark: 412 pg 69,157

Applicant: Maschinenfabrik Bidder AG, 8406 Winterthur, Switzerland Designation: Spooling device with adjustable contact pressure

The invention relates to a winding device with a Driving roller, one on one - or one on both sides - bobbin arm rotatably mounted coil and - at least - one under the effect a spring standing curve arm, which is connected to a guide curve a fixed point, e.g. B. a guide roller, rests on the spool arm on this with a pressure that varies according to the pivot position of the bobbin arm changes (USPS 2o150.951).

With this known arrangement, the influence of the increasing bobbin weight during the winding process should be controlled by a suitable choice the guide curve of the cam lever is switched off and on if possible uniform contact pressure of the bobbin on the drive roller can be achieved during the entire winding process. It has, however shown that maintaining a contact pressure that is as constant as possible is disadvantageous because initially a certain one Contact pressure is necessary to avoid slippage, but that is no longer required for further winding, and even This can lead to the layers being pushed out of the side of the coil will.

00982S / 1183

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The object of the invention is to overcome this disadvantage and to regulate the contact pressure so that it decreases rapidly at the beginning and then kept practically constant. Furthermore, the Contact pressure with easily interchangeable elements can be adapted to the requirements of the respective needs. A Another aim is to achieve a construction that is as compact as possible.

This is achieved according to the invention in that - based on the above-described, known embodiment - the on The spring acting on the curve arm is arranged between the curve arm and the coil arm.

! This very simple measure gives rise to the possibility ! a direct relation between the bobbin arm and the curve arm, there is also the possibility of a quick and easy

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that exchange of the curve arm or just its curve

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and finally the advantage that the curve is in a particularly one-j can be calculated, designed and manufactured in a fan-like manner. j

With the inventive arrangement of the spring between the coil arm and curve arm, any guide curve can be placed in the previous.- .. in the simple manner described, however, the ' Main task according to the invention only fulfilled when the The guide curve is dimensioned in such a way that the total torque resulting from the spring tension and the weight of the spool initially decreases significantly. increasing, but then essentially constant pressure / aer Coil on the! Friction roller results.

009825/1183

The invention is further and preferably from an execution

tion, which is described as known at the beginning, but in which! the bobbin arm is mounted at its lower end and when winding goes through the upper, vertical dead center position, so that the '

The bobbin rests on the side of the drive roller. In such an anj

Order of a known type, it is recommended according to the invention,; ■ · i

to provide a cam arm, the pivot axis of which is close to that of the bobbin arm and between it and the drive roller ' axis is mounted and its guide curve has a straight, | longitudinal part and an adjoining quarter j

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jkreis has. The production of such a guide curve is difficult; very easy. '

Finally, it is advisable to use one of the outputs on the guide curve i ■ '■. ".'

! Change position to be provided for the corresponding end area, which is designated as
i
'' Detent for the guide roller or the like of the bobbin arm off

• Is formed and preferably cooperates with a stop of the coil arm on the machine frame and has a roof shape
has a ridge point and two oppositely inclined sloping surfaces, which under the action of the spring tension
Coil arm presses against the machine-fixed stop.

pie invention is illustrated using an embodiment that

is shown in the drawing. Show here

! Fig. 1 a winding device in elevation at the beginning of the winding process,

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2 shows the same device at the end of the winding process,

Fig. 3 the same device in full swing or Spool change position of the spool arm and

Fog. 4 shows the course of the contact pressure as a function of the coil diameter.

A thread 1 arrives by means of a reciprocating thread guide 2, which is guided in a rotating grooved drum 4 mounted in the machine frame 3, onto a bobbin tube 5. This is on a bobbin arm 6 pivotally mounted and is used for Reibungsmitnähme on a drive roller 7 mounted on the machine frame

; Lays so that the thread 1 is in layers with a constant Ge-'speed winds up. This arrangement is known. The necessary contact pressure of the coil on the drive roller is according to of the invention by a tension spring hinged on the coil arm 6 at the top. 8 is generated, the lower end of which is hooked into a curve arm 9 ist.'DerkurvenarÜ 9 in turn is on the machine frame by one Wr spool arm pivot axis pivotably mounted parallel axis. 'The swivel axis of the cam arm is close to and above that of the coil arm and between it and that the drive roller. The bobbin arm 6 carries a roller 10 in its lower half, which with a guide cam 11 on the cam 9 cooperates. The bobbin arm 6 also has a downward extension 12, the end of which is fully swung out comes to rest on the stop 13 of the machine frame. At this Articulated extension is also a damping system 14 for damping;

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provided by vibrations that can be caused by non-circular sleeves or coils. It also serves to protect the Spool holder bearing when folding back the arms 6 after changing the spool, where otherwise the still empty sleeve 5 would have to hit the drive roller 7 hard.

As can be seen from Fig. 1, the points of articulation are located A, B of the spring 8 and the lever C with the empty sleeve 5 in place on a straight line g and the guide curve 11 is arranged so that in this position there is still no deflection of the spring pivot points from this connecting line g takes place. Now experiences the coil 15 as a result of the build-up of the winding an enlargement of the Diameter d (FIG. 2), the bobbin arm 6 slowly swivels counterclockwise, the hollow 10, which on the guide curve 11 is applied, deflects the lever 9 out of the connecting straight line g, so that the spring 8 is additionally tensioned. But above all it will the moment acting on the coil arm 6, formed from the spring force P χ lever arm a, is enlarged. The guide curve 11 is designed so that £ at the transition of the arm through the vertical position the spring force increasingly begins to act, whereby the through the increasing The force component arising from the weight of the spool for pivoting the arm 6 counterclockwise with increasing pivoting is overcoated. You have it with the right choice of leading curve 11 in hand, a desired initially strongly decreasing and later approximately constant contact pressure curve according to ig. 4 reach. The pressure can drop quite steeply at the beginning after the risk of slipping of the empty spool has been overcome st. Then until the coil is completely filled

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the contact pressure is kept almost constant at a reduced size; so that the lateral squeezing out of layers can be suppressed. λ

The guide curve 11 arranged on the curve arm 9 follows at the top initially essentially stretched and vertical (Pig. I),

But then it turns into an approximately quarter-circle arc 16. As can be seen particularly clearly from FIG. 3, the curve arm 9 also has a curve zone 17 which is completely swiveled out Position is roof-shaped and allows the coil arm 6 to be guided beyond an unstable dead center T. An undesired, automatic pivoting back when the bobbin arm is relieved of load, d. H. after removing the full bobbin, is accordingly no longer possible. -

Expectations

009825/1183

Claims (4)

1952776 Expectations: 1 · Spooling device with a drive roller, a spool rotatably mounted on at least one spool arm and at least one under the action of a spring curve arm, which with a guide curve at a fixed point, z. B. a guide roller, on the coil, arm rests on this with a pressure which changes according to the pivot position of the coil arm, characterized in that the spring (8) between curves (6) and Coil arm (9) is arranged. 2. Apparatus according to claim 1, characterized by a guide curve (11) through which the spring tension | and spool weight resulting total torque in such a way ' is controlled, d * ate an initially strongly decreasing, then essentially constant contact pressure of the coil (5, 15) the drive roller (7) results. 3. Apparatus according to claim 1 or 2 with at least one below mounted bobbin arm, which when winding through the upper, vertical Dead center goes, and a corresponding laterally adjacent to the drive roller coil, marked by a cam arm (9), the pivot axis of which is close to and above that of the coil arm (6) and between her and the drive roller axis and whose guide curve is a substantially ' borrowed elongated longitudinal part (11) and. a yourself has subsequent quarter circle part (16). 0 0 9 S 2 5/1 'R 3 4. Device according to one of claims T -3 »marked through an end area of the guide cam (11) corresponding to the replacement position, which acts as a box for the guide roller (10) of the Spulenannes (6) is formed and a roof shape with a ridge point (T) and two oppositely inclined Has inclined surfaces (17) under the action of the spring. (8) hold the bobbin arm (6,12) in the swiveled-out position. sen-ky OC SS2 5 - "1 * ° 3